当前位置: X-MOL 学术Surf. Coat. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of ultrasonic surface rolling processing on microstructure and wear properties of high-carbon high-chromium steel
Surface & Coatings Technology ( IF 5.4 ) Pub Date : 2021-07-21 , DOI: 10.1016/j.surfcoat.2021.127531
Yong Duan 1 , Shengguan Qu 1 , Siyu Jia 1 , Xiaoqiang Li 1
Affiliation  

The main purpose of this work was to study the dissolution behavior of carbides and the microstructure evolution in high-carbon high-chromium steel during ultrasonic surface rolling processing (USRP), as well as the wear properties of the samples before and after USRP. The microstructural features of the surface deformed layer were characterized by some microscopic analysis methods (SEM, TEM, EBSD, XRD and microhardness analysis). The wear properties of the untreated and treated samples were tested using a reciprocating tribometer. Results indicated that the long rod-shaped primary carbides (PCs) can be sufficiently fractured and dissolved during USRP, resulting in the formation of fine microstructure at the surface adjacent region. During USRP, the equiaxed grains were formed due to the continuous dynamic recrystallization (CDRX), and the fraction of recrystallized grains increased with the decrease in depth. The dissolution of hard carbides and the occurrence of CDRX during USRP limited the further improvement of hardness. However, the fine microstructure of the USRP treated sample helped to inhibit the initiation and propagation of cracks, which benefited the wear resistance of the material.



中文翻译:

超声波表面滚压加工对高碳高铬钢组织和磨损性能的影响

本工作的主要目的是研究超声表面滚压加工(USRP)过程中高碳高铬钢中碳化物的溶解行为和微观结构演变,以及USRP前后样品的磨损性能。通过一些显微分析方法(SEM、TEM、EBSD、XRD和显微硬度分析)表征了表面变形层的显微结构特征。使用往复式摩擦计测试未处理和处理样品的磨损性能。结果表明,长棒状初生碳化物(PCs)在USRP过程中可以充分断裂和溶解,从而在表面相邻区域形成精细的微观结构。在 USRP 期间,由于连续动态再结晶 (CDRX),等轴晶粒形成,再结晶晶粒的比例随着深度的减小而增加。USRP过程中硬质碳化物的溶解和CDRX的出现限制了硬度的进一步提高。然而,USRP 处理样品的精细微观结构有助于抑制裂纹的产生和扩展,这有利于材料的耐磨性。

更新日期:2021-07-23
down
wechat
bug